Method and apparatus for blowing drying gas in a paper machine
US7017279B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2003 |
| Grant date | Mar 28, 2006 |
| Priority date | — |
| Expiry date | Dec 17, 2023 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F5/18
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of blowing drying gas against a paper web, and an impingement dryer of a paper machine. Drying gas is blown with an impingement dryer comprising several profiling chambers in the cross-direction of a paper machine, the cross-profile of the paper web being controlled with the drying gas blown from the profiling chambers. Each profiling chamber blows drying gas to its own effect range. The impingement dryer further comprises a return air chamber and return air ducts such that drying gas blown against the paper web from the profiling chambers is returned into the return air chamber through the return air ducts in such a way that some of the effect of the drying gas blown from the profiling chamber is at least partly prevented from reaching the effective area of the adjacent profiling chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.